<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Login</title>
</head>
<body>
<form action="/login" method="post">
    <div>
        <label>
            用户名
            <input type="text" name="username" required/>
        </label>
    </div>
    <div>
        <label>
            密码
            <input type="password" name="password" required/>
        </label>
    </div>
    <div>
        <label>
            验证码
            <input type="text" name="captcha" required/>
        </label>
        <div>
            <img src="/captcha" onclick="this.src='/captcha'">
        </div>
    </div>
    <div>
        <button type="submit">登录</button>
    </div>
</form>
</body>
</html>